Truncated Class 1 Integron Gene Cassette Arrays Contribute to Antimicrobial Resistance of Diarrheagenic Escherichia coli

Table 1

Diarrheagenic Escherichia coli strains used in this study (n = 162).

Pathogenic categories	No. of strains	Origin	O-serogroup	Isolation year
EAEC	40	Symptomatic patient (n = 17)	86 (n = 1), 111 (n = 1), 125 (n = 1), 126 (n = 1), 127 (n = 2), 153 (n = 1), OUT (n = 10)	2012–2014
		Asymptomatic carrier (n = 23)	44 (n = 1), 55 (n = 1), 86 (n = 1), 126 (n = 2), OUT (n = 18)	2012–2014
EPEC	37	Symptomatic patient (n = 12)	55 (n = 1), 114 (n = 1), 164 (n = 1), OUT (n = 9)	2012–2014
		Asymptomatic carrier (n = 25)	15 (n = 1), 63 (n = 1), 124 (n = 2), 125 (n = 1), 145 (n = 1), 167 (n = 1), OUT (n = 18)	2013-2014
STEC	83	Symptomatic patient (n = 68)	26 (n = 3), 103 (n = 3), 111 (n = 4), 145 (n = 2), 157 (n = 54), 165 (n = 1), 186 (n = 1)	2012–2014
		Asymptomatic carrier (n = 15)	26 (n = 3), 157 (n = 12)	2012–2014
ETEC	2	Asymptomatic carrier (n = 2)	148 (n = 1), 169 (n = 1)	2013-2014

EAEC: enteroaggregative E. coli; EPEC: enteropathogenic E. coli; STEC: Shiga toxin-producing E. coli; ETEC: enterotoxigenic E. coli; OUT: O-serogroup untypeable.